Grinding-mill.



PATENTED JUNE 25, 1907.

A. M. DELLINGER. GRINDING MILL. OATION 1 Ln' lVlT/VESSES:

MMW.

ATTORNEY.-

UNITED STATES PATENT OFFICE.

GRINDING-MILL- Specification of Letters Patent.

Patented June 25, 1907.

Application filed April 15, 1904. serial No. 203,309.

To all whom it may concern:

Be it known that I, ABRAHAM M. DEL- LINGER, a citizen of the UnitedStates, residing at Lancaster, in the county of Lancaster and State ofPennsylvania, have invented certain new and useful Improvements inGrinding- Mills, of which the following is a specification, referencebeing had therein to the ace com anying drawing. I

T is invention relates to grinding disks used in mills and has for itsobject to improve the same in simplicity, cheapness of manufacture andefliclency.

To this end, my invention consists in the construction hereinafter moreparticularly set forth and claimed.

In the accompanying drawing, Figure 1 represents aplan of a grindingdisk embodying my invention; Fig. 2 represents a cross section of thesame on line AA of Fig. 1; Fig. 3 represents a top perspective view of.a broken out section of the d1sk; Fig. 4 re resents an edge view of aportion of the isk; and Fig. 5 represents a section on line BB of Fig.1.

In said drawings, 6 designates the disk having an inclined bosom 7 and aland 8 concen trio therewith in a plane at right angles to the aXis ofthe eye. The said bosom is provided with a series of groups of parallelapproximately tangential furrows 9 and intervening ribs 11 following theinclination of Said bosom to the eye 13. The said land is provided witha series of similar grou s of parallel furrows and intervening ri s 15which are finer than those before mentioned and in the plane of saidland. A series of in the direction of rotation, which is indicated byarrow 16. All the furrows and ribs incline inwardly in this direction.In making this disk I cast the feed drifts 12, furrows 9 and sharp edgedribs 11 of the bosom, but leave the land in such casting without ribs orfurrows. I then grind the land smooth and cut therein the furrows 10,shar ening the intervening ribs 15,- so as to get sharper and moreregular and even ribs and furrows in said land than would be practicableby casting.

. Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A grinding disk having feed drifts and groups of parallel ribs caston the bosom and narrower groups of finer and substantially parallelribs out upon the land.

2. A grinding d1sk having an inwardly inclined bosom rovided with groupsof parallel ribs and eed drifts raised at intervals about its eye,leaving passages or conveyer flights between them, sald blocks havinghorizontal tops and outer edges which incline inwardly in the directionof rotation and a land provided with" roups of finer and substantiallyarallel r' s as above set forth.

XBRAHAM M. DELLINGER.

Witnesses:

O. G. BASSLER, WM. R. GERHART.

